<?php
// +----------------------------------------------------------------------
// | 众联TK架构 [ ZoomTk ]
// +----------------------------------------------------------------------
// | 版权所有 2017~2037 成都众联思索科技有限公司 [ http://www.zoomtk.com ]
// +----------------------------------------------------------------------
// | 官方网站: http://www.sopvip.com
// +----------------------------------------------------------------------
// | 开源协议 ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------

// 为方便系统核心升级，二次开发中需要用到的公共函数请写在这个文件，不要去修改common.php文件
use think\Db;
use \traits\controller\Jump;
/**
 * 加密函数
 *
 * @param string $txt 需要加密的字符串
 * @param string $key 密钥
 * @return string 返回加密结果
 */
function encrypt($txt, $key = ''){
    $uc_key = config('data_auth_key') ? config('data_auth_key') : 'shoptk';

    if (empty($txt)) return $txt;
    if (empty($key)) $key = md5($uc_key);
    $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.";
    $ikey ="-x6g6ZWm2G9g_vr0Bo.pOq3kRIxsZ6rm";
    $nh1 = rand(0,64);
    $nh2 = rand(0,64);
    $nh3 = rand(0,64);
    $ch1 = $chars{$nh1};
    $ch2 = $chars{$nh2};
    $ch3 = $chars{$nh3};
    $nhnum = $nh1 + $nh2 + $nh3;
    $knum = 0;$i = 0;
    while(isset($key{$i})) $knum +=ord($key{$i++});
    $mdKey = substr(md5(md5(md5($key.$ch1).$ch2.$ikey).$ch3),$nhnum%8,$knum%8 + 16);
    $txt = base64_encode(time().'_'.$txt);
    $txt = str_replace(array('+','/','='),array('-','_','.'),$txt);
    $tmp = '';
    $j=0;$k = 0;
    $tlen = strlen($txt);
    $klen = strlen($mdKey);
    for ($i=0; $i<$tlen; $i++) {
        $k = $k == $klen ? 0 : $k;
        $j = ($nhnum+strpos($chars,$txt{$i})+ord($mdKey{$k++}))%64;
        $tmp .= $chars{$j};
    }
    $tmplen = strlen($tmp);
    $tmp = substr_replace($tmp,$ch3,$nh2 % ++$tmplen,0);
    $tmp = substr_replace($tmp,$ch2,$nh1 % ++$tmplen,0);
    $tmp = substr_replace($tmp,$ch1,$knum % ++$tmplen,0);
    return $tmp;
}

/**
 * 解密函数
 *
 * @param string $txt 需要解密的字符串
 * @param string $key 密匙
 * @return string 字符串类型的返回结果
 */
function decrypt($txt, $key = '', $ttl = 0){
    $uc_key = config('data_auth_key') ? config('data_auth_key') : 'shoptk';
    if (empty($txt)) return $txt;
    if (empty($key)) $key = md5($uc_key);
    $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.";
    $ikey ="-x6g6ZWm2G9g_vr0Bo.pOq3kRIxsZ6rm";
    $knum = 0;$i = 0;
    $tlen = @strlen($txt);
    while(isset($key{$i})) $knum +=ord($key{$i++});
    $ch1 = @$txt{$knum % $tlen};
    $nh1 = strpos($chars,$ch1);
    $txt = @substr_replace($txt,'',$knum % $tlen--,1);
    $ch2 = @$txt{$nh1 % $tlen};
    $nh2 = @strpos($chars,$ch2);
    $txt = @substr_replace($txt,'',$nh1 % $tlen--,1);
    $ch3 = @$txt{$nh2 % $tlen};
    $nh3 = @strpos($chars,$ch3);
    $txt = @substr_replace($txt,'',$nh2 % $tlen--,1);
    $nhnum = $nh1 + $nh2 + $nh3;
    $mdKey = substr(md5(md5(md5($key.$ch1).$ch2.$ikey).$ch3),$nhnum % 8,$knum % 8 + 16);
    $tmp = '';
    $j=0; $k = 0;
    $tlen = @strlen($txt);
    $klen = @strlen($mdKey);
    for ($i=0; $i<$tlen; $i++) {
        $k = $k == $klen ? 0 : $k;
        $j = strpos($chars,$txt{$i})-$nhnum - ord($mdKey{$k++});
        while ($j<0) $j+=64;
        $tmp .= $chars{$j};
    }
    $tmp = str_replace(array('-','_','.'),array('+','/','='),$tmp);
    $tmp = trim(base64_decode($tmp));

    if (preg_match("/\d{10}_/s",substr($tmp,0,11))){
        if ($ttl > 0 && (time() - substr($tmp,0,11) > $ttl)){
            $tmp = null;
        }else{
            $tmp = substr($tmp,11);
        }
    }
    return $tmp;
}
/***
 * 为定义数组给用数组赋值
 * @param array $data
 * @param array $fields
 * @return array
 */
 function checkFields ($data= array(), $fields = array())
{
    foreach ($fields as $key =>$val){
        $list[$val]='';
    }
    if(is_array($data)){
        foreach ($data as $k => $val) {
            if (!in_array($k, $fields)) {
                unset($data[$k]);
            }
        }
    }else{
        $data=array();
    }
   return array_merge($list,$data);
}

/***
 * 加载语言库
 * @param $name
 * @param string $suffix
 * @return mixed
 */
function  L($name,$suffix=''){
    str_replace('，',',',$name);
    $tmp = explode(',',$name);
    foreach($tmp as $v){
        $lang=cookie('think_var')?cookie('think_var'):\think\Lang::detect();
        // 获取当前模块名称
        $module = '';
        $dispatch = request()->dispatch();
        if (isset($dispatch['module'])) {
            $module = $dispatch['module'][0];
        }
        $file=  APP_PATH.$module.'/lang/'.str_replace('-', '_', $lang).'/'.$v.'.php';
        if(is_file($file)){
            \think\Lang::load($file);
        }else{
             $jump=model('showmsg');
             return $jump->showMsg("Lang Error:".$file."无法加载或者不存在!");
        }
    }
}


/**
 * 是否为手机访问
 * @return boolean [description]
 */
 function isMobile() {//return true;
    // 如果有HTTP_X_WAP_PROFILE则一定是移动设备
    if (isset($_SERVER['HTTP_X_WAP_PROFILE'])) {
        return true;
    }

    // 如果via信息含有wap则一定是移动设备,部分服务商会屏蔽该信息
    if (isset($_SERVER['HTTP_VIA'])) {
        // 找不到为flase,否则为true
        return stristr($_SERVER['HTTP_VIA'], "wap") ? true : false;
    }
    // 脑残法，判断手机发送的客户端标志,兼容性有待提高
    if (isset($_SERVER['HTTP_USER_AGENT'])) {
        $clientkeywords = array('nokia', 'sony', 'ericsson', 'mot', 'samsung', 'htc', 'sgh', 'lg', 'sharp', 'sie-', 'philips', 'panasonic', 'alcatel', 'lenovo', 'iphone', 'ipod', 'blackberry', 'meizu', 'android', 'netfront', 'symbian', 'ucweb', 'windowsce', 'palm', 'operamini', 'operamobi', 'openwave', 'nexusone', 'cldc', 'midp', 'wap', 'mobile');
        // 从HTTP_USER_AGENT中查找手机浏览器的关键字
        if (preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT']))) {
            return true;
        }

    }
    // 协议法，因为有可能不准确，放到最后判断
    if (isset($_SERVER['HTTP_ACCEPT'])) {
        // 如果只支持wml并且不支持html那一定是移动设备
        // 如果支持wml和html但是wml在html之前则是移动设备
        if ((strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') !== false) && (strpos($_SERVER['HTTP_ACCEPT'], 'text/html') === false || (strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'], 'text/html')))) {
            return true;
        }
    }
    return false;
}

 function is_wechat() {
    if (strpos($_SERVER['HTTP_USER_AGENT'], 'MicroMessenger') !== false) {
        return true;
    }
    return false;
}